Home / 1,221.12-1,823.07-1,106.28

Finding the Fourth Proportional to 1,221.12, 1,823.07 and 1,106.28

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Solution

The fourth proportional to 1,221.12, 1,823.07 and 1,106.28 is: 1,651.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.12 : 1,823.07 = 1,106.28 : x
  2. Step 2: Convert to fraction form
    1,221.12/1,823.07 = 1,106.28/x
  3. Step 3: Cross multiply
    1,221.12x = 1,823.07 × 1,106.28
  4. Step 4: Simplify right side
    1,221.12x = 2,016,825.88
  5. Step 5: Solve for x
    x = 2,016,825.88/1,221.12
  6. Step 6: Final answer
    x = 1,651.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.